FN Herstal PS90 SBR 5.7x28mm — 10.5 in Threaded Barrel, Multi-Port Brake, Bullpup, Bottom Ejection, Black — NFA Item
This FN Herstal PS90 was converted and registered as a short‑barreled rifle (Form 1) and is set up with an approximately 10.5-inch barrel, a threaded muzzle, and a multi-port muzzle brake. It carries the required NFA/maker engraving on the front of the receiver. The compact bullpup configuration with downward ejection and a long top Picatinny rail delivers the PS90’s distinctive ergonomics in an SBR format. This is an NFA item and will require a tax stamp.
Condition
Overall Condition: Excellent condition, showing only faint signs of any prior use or handling.
Bore Condition: Excellent - Clean, mirror finish, no signs of wear.
Bore Rifling: Excellent Rifling - Sharp lands and grooves.
Specific Condition Notes: This firearm is in great shape. There are some minor scratches and blemishes present. The bore is clean and shiny.
What's Included
- 2x 50-round PS90/P90-pattern translucent polymer magazines
- Installed multi-port muzzle brake
- Installed MIL-STD-1913 Picatinny top rail
Built on FN’s bullpup platform, this PS90 SBR retains the model’s signature bottom ejection chute and top-mounted detachable magazine system. It is chambered in 5.7x28mm with a 50+1 capacity using standard PS90/P90-pattern magazines, and two 50-round magazines are included.
The SBR conversion was completed via NFA/Form 1 and includes maker engraving on the front of the receiver. The barrel measures approximately 10.5 inches and is threaded, with a multi-port muzzle brake installed to manage muzzle movement.
A single long MIL-STD-1913 top rail is installed, providing a continuous mounting surface. The action operates semi-automatically via a straight blowback, closed-bolt system.
Originating from Belgium, this example bears the FNH USA Fredericksburg, VA mark. It features a black polymer stock with a 13.5-inch length of pull, preserving the PS90’s compact handling characteristics in a registered SBR configuration. This is an NFA item and will require a tax stamp.